func reflectCmp(i, j interface{}, fieldName string) bool {  //按传入fieldName 排序
    valI := reflect.ValueOf(i).FieldByName(fieldName).Interface()
    valJ := reflect.ValueOf(j).FieldByName(fieldName).Interface()
    switch s := valI.(type) {
    case string:
        return s < valJ.(string)
    case float64:
        return s < valJ.(float64)
    case int:
        return s < valJ.(int)
    default:
        fmt.Println("The type is unknown")
    }
    return true
}

type person struct {
    Age int
    Name string
}

func main() {
    pSlice := []person{{20,"a"},{15,"be"},{32,"cc"},{2,"aa"}}
    var p person
    typeOfA := reflect.TypeOf(p)
 
    // 遍历结构体所有成员
    for i := 0; i < typeOfA.NumField(); i++ {
        // 获取每个成员的结构体字段类型
        fieldType := typeOfA.Field(i)
        sort.Slice(pSlice,func(i, j int) bool {
            return reflectCmp(pSlice[i],pSlice[j],fieldType.Name)
        })
        fmt.Println(pSlice)
    }
}